Chapter 4 analyzes gender and number agreement processes within the Determiner Phrase (DP) of Yungueño Spanish, Chota Valley Spanish and Chincha Spanish. The data presented here show a variety of reduced agreement configurations, which are rooted in L2 processing constraints applying at the morphology–semantics interface. A unified account of these phenomena is provided by adopting current formal proposals on the nature of feature valuation and checking (Frampton & Gutmann 2000; Pesetsky & Torrego 2007). In so doing, this chapter enhances a stronger dialogue between syntactic theory and variationist analysis, which is fundamental to account for the nature and evolution of the agreement domain across the DP of these Afro-Hispanic dialects.